Fig.10 Oscillation Frequency Fluctuation vs.
Junction Temperature
5
0
-5
-10
-25
VIN=12V
VO=5V
0 25 50 75 100 125
Junction temperature Tj(°C)
PQ1CG2032FZH/PQ1CG2032RZH
Fig.11 Overcurrent Detecting Level
Fluctuation vs. Junction Temperature
6
4
2
0
-2
-4
-6
-8
-25 0 25 50 75 100 125
Junction temperature Tj(°C)
Fig.12 Threshold Voltage vs. Junction
Temperature
3
VTH(H)
VIN=12V
2.5
2
VTH(L)
1.5
1
0.5
0
-25
VTH(ON)
0 25 50 75 100 125
Junction temperature Tj(°C)
Fig.13 Operating Dissipation Current vs.
Input Voltage
10
Tj=25°C
VO=5V
9
IO=1A
8
7
IO=3A
6
No load
5
0
10
20
30
40
Input voltage VIN(V)
Fig.14 Block Diagram
1 VIN
Overcurrent
detection
circuit
Overheat
detection
circuit
Voltage
regulator
ON/OFF
circuit
PWM COMP.
+
−
Q
F/F R
S
ERROR AMP.
−
+
Vref
3 COM
2 VOUT
5 ON/OF F
4 Oadj
Sheet No.: OP06084
4